s1_generate_a_series_of_files(){
    for i in {1..100};do echo $i>/tmp/new_file$i;done
}

function s2_list_4_files_in_long_format_about_account_and_group(){
    ls -l /etc/{passwd,shadow,group,gshadow} |sort -d
}

function s3_find_items_related_to_given_username(){
    grep -h $1 /etc/{passwd,shadow} |sort -d
}

function s4_find_items_related_to_given_group_name(){
    grep -h $1 /etc/{group,gshadow} |sort -d
}
function s5_create_groups_for_given_group_names(){
    groupadd rnd && groupadd itoperation
}
function s6_create_users_and_set_their_group_as_required(){
    useradd -G rnd adam && useradd -G rnd bob && useradd -G itoperation calvin && useradd -G itoperation david && useradd -G rnd edward
}

function s7_change_users_shell(){
    usermod -s /usr/bin/sh adam && usermod -s /usr/bin/sh edward	
}

function s8_set_password_change_policy(){
    passwd -n 10 -x 60 -w 10 adam
    passwd -n 10 -x 60 -w 10 bob
    passwd -n 10 -x 60 -w 10 david
    passwd -n 10 -x 60 -w 10 calvin
    passwd -n 10 -x 60 -w 10 edward

}

function s10_lock_bobs_password()
{
	usermod -L bob
}	

